CN111548082A - Impervious concrete and preparation method thereof - Google Patents

Abstract

The invention discloses an impervious concrete which comprises, by weight, 100-200 parts of cement, 15-25 parts of fly ash, 2-5 parts of an additive, 50-100 parts of water, 500 parts of sand 300, 600 parts of gravel, 15-30 parts of mineral powder and 5-15 parts of an expanding agent. The impervious concrete and the preparation method thereof have the advantages that the admixture is added, so that the interior of the concrete generates disconnected bubbles, the capillary channel is cut off, and the pore structure is changed, so that the impermeability of the concrete is improved, in addition, the water cement ratio is reduced, the construction quality is ensured by selecting cement with proper variety and strength grade, and fine sand and broken stone are selected as aggregates to reduce the gaps among the aggregates, so that the impermeability is improved.

Description

Impervious concrete and preparation method thereof

Technical Field

The invention relates to the technical field of concrete, in particular to impervious concrete and a preparation method thereof.

Background

Concrete is a general name of engineering composite materials formed by cementing aggregate into a whole by a cementing material, and is one of the most important civil engineering materials in the present generation.

As one of the largest structural materials in national economic construction, the strength is always the main performance index of concrete, but when people pursue high strength, dam leakage and basement water seepage and damp occur, the safety of a bridge is questioned and is finally dismantled and rebuilt, many public places are forced to be closed, a large amount of manpower and material resources are wasted, and the safety of human life and property is seriously threatened, so that the impervious concrete and the preparation method thereof are provided.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides anti-permeability concrete and a preparation method thereof, and solves the problem of concrete impermeability.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the impervious concrete consists of cement 100-200 weight portions, flyash 15-25 weight portions, additive 2-5 weight portions, water 50-100 weight portions, sand 300-500 weight portions, crushed stone 400-600 weight portions, mineral powder 15-30 weight portions and expanding agent 5-15 weight portions.

Preferably, the type of the cement is PO42.5, the type of the fly ash is grade II, the type of the additive is TH-A-IX, the sand is medium sand, the particle size of the broken stone is 5-31.5mm, the specification of the mineral powder is S95, and the expanding agent is HEA expanding agent.

A preparation method of impervious concrete comprises the following steps:

s1, strictly metering according to the production proportion of each raw material;

and S2, adding the sand and the crushed stone into a stirrer for stirring, adding the fly ash, the mineral powder and the cement into the stirrer for continuous stirring, adding water for stirring, and finally adding the additive and the expanding agent simultaneously for stirring uniformly for 60 seconds.

(III) advantageous effects

The invention provides impervious concrete and a preparation method thereof, and the impervious concrete has the following beneficial effects:

the impervious concrete and the preparation method thereof have the advantages that the admixture is added, so that the interior of the concrete generates disconnected bubbles, the capillary channel is cut off, and the pore structure is changed, so that the impermeability of the concrete is improved, in addition, the water cement ratio is reduced, the construction quality is ensured by selecting cement with proper variety and strength grade, and fine sand and broken stone are selected as aggregates to reduce the gaps among the aggregates, so that the impermeability is improved.

Detailed Description

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The impervious concrete consists of cement 100 weight portions, flyash 17 weight portions, additive 2.2 weight portions, water 51 weight portions, sand 327 weight portions, crushed stone 451 weight portions, mineral powder 17 weight portions and swelling agent 8 weight portions.

The type of the cement is PO42.5, the type of the fly ash is grade II, the type of the additive is TH-A-IX, the sand is medium sand, the particle size of the broken stone is 10mm, the specification of the mineral powder is S95, and the expanding agent is HEA expanding agent.

A preparation method of impervious concrete comprises the following steps:

s1, strictly metering according to the production proportion of each raw material;

and S2, adding the sand and the crushed stone into a stirrer for stirring, adding the fly ash, the mineral powder and the cement into the stirrer for continuous stirring, adding water for stirring, and finally adding the additive and the expanding agent simultaneously for stirring uniformly for 60 seconds.

Example 2

The impervious concrete consists of cement 50 weight portions, flyash 20 weight portions, additive 10 weight portions, water 80 weight portions, sand 400 weight portions, crushed stone 540 weight portions, mineral powder 30 weight portions and expanding agent 5 weight portions.

The type of the cement is PO42.5, the type of the fly ash is grade II, the type of the additive is TH-A-IX, the sand is medium sand, the particle size of the broken stone is 20mm, the specification of the mineral powder is S95, and the expanding agent is HEA expanding agent.

A preparation method of impervious concrete comprises the following steps:

s1, strictly metering according to the production proportion of each raw material;

and S2, adding the sand and the crushed stone into a stirrer for stirring, adding the fly ash, the mineral powder and the cement into the stirrer for continuous stirring, adding water for stirring, and finally adding the additive and the expanding agent simultaneously for stirring uniformly for 60 seconds.

Example 3

The impervious concrete consists of cement 70 weight portions, flyash 50 weight portions, additive 5 weight portions, water 75 weight portions, sand 200 weight portions, crushed stone 500 weight portions, mineral powder 10 weight portions and expanding agent 5 weight portions.

The type of the cement is PO42.5, the type of the fly ash is grade II, the type of the additive is TH-A-IX, the sand is medium sand, the particle size of the broken stone is 30mm, the specification of the mineral powder is S95, and the expanding agent is HEA expanding agent.

A preparation method of impervious concrete comprises the following steps:

s1, strictly metering according to the production proportion of each raw material;

and S2, adding the sand and the crushed stone into a stirrer for stirring, adding the fly ash, the mineral powder and the cement into the stirrer for continuous stirring, adding water for stirring, and finally adding the additive and the expanding agent simultaneously for stirring uniformly for 60 seconds.

Experiment of

The concrete processed by the three embodiments is tested, and the testing steps are as follows:

taking out 10 products produced in the three embodiments, airing the surfaces of the products, coating a layer of molten sealing material on the side surfaces of the products, pressing the products into a test piece sleeve preheated by an oven on a spiral or other pressurizing devices, slightly cooling the products, releasing the pressure, and sleeving the products on an impermeability instrument for testing;

the test starts from the water pressure of 0.1 MPa, the water pressure is increased by 0.1 MPa every 8 hours, and the water seepage condition of the end face of the test piece needs to be observed at any time, and the test results are as follows:

in conclusion, the proportion of the embodiment 1 is optimal, and the anti-seepage standard of building construction is met.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. An impervious concrete characterized by: the impermeable concrete comprises, by weight, 100-200 parts of cement, 15-25 parts of fly ash, 2-5 parts of an additive, 50-100 parts of water, 500 parts of sand 300, 600 parts of crushed stone 400, 15-30 parts of mineral powder and 5-15 parts of an expanding agent.

2. The impervious concrete of claim 1, wherein: the type of the cement is PO42.5, the type of the fly ash is grade II, the type of the additive is TH-A-IX, the sand is medium sand, the particle size of the broken stone is 5-31.5mm, the specification of the mineral powder is S95, and the expanding agent is HEA expanding agent.

3. A method of preparing an impermeable concrete according to any one of claims 1-2, characterised in that it comprises the following steps:

s1, strictly metering according to the production proportion of each raw material;

and S2, adding the sand and the crushed stone into a stirrer for stirring, adding the fly ash, the mineral powder and the cement into the stirrer for continuous stirring, adding water for stirring, and finally adding the additive and the expanding agent simultaneously for stirring uniformly for 60 seconds.